Order-7 cubic honeycomb

Order-7 cubic honeycomb
Type	Regular honeycomb
Schläfli symbols	{4,3,7}
Coxeter diagrams
Cells	{4,3}
Faces	{4}
Edge figure	{7}
Vertex figure	{3,7}
Dual	{7,3,4}
Coxeter group	[4,3,7]
Properties	Regular

In the geometry of hyperbolic 3-space, the order-7 cubic honeycomb is a regular space-filling tessellation (or honeycomb). With Schläfli symbol {4,3,7}, it has seven cubes {4,3} around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many cubes existing around each vertex in an order-7 triangular tiling vertex arrangement.

Images

Poincaré disk model

Cell-centered
One cell at center	One cell with ideal surface

Related polytopes and honeycombs

It is one of a series of regular polytopes and honeycombs with cubic cells: {4,3,p}:

It is a part of a sequence of hyperbolic honeycombs with order-7 triangular tiling vertex figures, {p,3,7}.

{3,3,7}	{4,3,7}	{5,3,7}	{6,3,7}	{7,3,7}	{8,3,7}	{∞,3,7}

Order-8 cubic honeycomb

Order-8 cubic honeycomb
Type	Regular honeycomb
Schläfli symbols	{4,3,8} {4,(3,8,3)}
Coxeter diagrams	=
Cells	{4,3}
Faces	{4}
Edge figure	{8}
Vertex figure	{3,8}, {(3,4,3)}
Dual	{8,3,4}
Coxeter group	[4,3,8] [4,((3,4,3))]
Properties	Regular

In the geometry of hyperbolic 3-space, the order-8 cubic honeycomb a regular space-filling tessellation (or honeycomb). With Schläfli symbol {4,3,8}. It has eight cubes {4,3} around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many cubes existing around each vertex in an order-8 triangular tiling vertex arrangement.

Poincaré disk model Cell-centered

Poincaré disk model

It has a second construction as a uniform honeycomb, Schläfli symbol {4,(3,4,3)}, Coxeter diagram, , with alternating types or colors of cubic cells.

Infinite-order cubic honeycomb

Infinite-order cubic honeycomb
Type	Regular honeycomb
Schläfli symbols	{4,3,∞} {4,(3,∞,3)}
Coxeter diagrams	=
Cells	{4,3}
Faces	{4}
Edge figure	{∞}
Vertex figure	{3,∞}, {(3,∞,3)}
Dual	{∞,3,4}
Coxeter group	[4,3,∞] [4,((3,∞,3))]
Properties	Regular

In the geometry of hyperbolic 3-space, the infinite-order cubic honeycomb a regular space-filling tessellation (or honeycomb). With Schläfli symbol {4,3,∞}. It has infinitely many cubes {4,3} around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many cubes existing around each vertex in an infinite-order triangular tiling vertex arrangement.

Poincaré disk model Cell-centered

Poincaré disk model

It has a second construction as a uniform honeycomb, Schläfli symbol {4,(3,∞,3)}, Coxeter diagram, , with alternating types or colors of cubic cells.

See also

• Convex uniform honeycombs in hyperbolic space
• List of regular polytopes
• Infinite-order hexagonal tiling honeycomb

References

• Coxeter, Regular Polytopes, 3rd. ed., Dover Publications, 1973. ISBN:0-486-61480-8. (Tables I and II: Regular polytopes and honeycombs, pp. 294–296)
• The Beauty of Geometry: Twelve Essays (1999), Dover Publications, LCCN 99-35678, ISBN:0-486-40919-8 (Chapter 10, Regular Honeycombs in Hyperbolic Space) Table III
• Jeffrey R. Weeks The Shape of Space, 2nd edition ISBN:0-8247-0709-5 (Chapters 16–17: Geometries on Three-manifolds I, II)
• George Maxwell, Sphere Packings and Hyperbolic Reflection Groups, JOURNAL OF ALGEBRA 79,78-97 (1982) [1]
• Hao Chen, Jean-Philippe Labbé, Lorentzian Coxeter groups and Boyd-Maxwell ball packings, (2013)[2]
• Visualizing Hyperbolic Honeycombs arXiv:1511.02851 Roice Nelson, Henry Segerman (2015)

External links

• John Baez, Visual insights: {7,3,3} Honeycomb (2014/08/01) {7,3,3} Honeycomb Meets Plane at Infinity (2014/08/14)
• Danny Calegari, Kleinian, a tool for visualizing Kleinian groups, Geometry and the Imagination 4 March 2014. [3]